English

Definition of permutation noun from the Oxford Advanced Learner's Dictionary

 

permutation

 noun
noun
BrE BrE//ˌpɜːmjuˈteɪʃn//
 
; NAmE NAmE//ˌpɜːrmjuˈteɪʃn//
 
[usually plural]
 
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any of the different ways in which a set of things can be ordered The possible permutations of x, y and z are xyz, xzy, yxz, yzx, zxy and zyx. Word Origin late Middle English (in the sense ‘exchange, barter’): via Old French from Latin permutatio(n-), from the verb permutare ‘change completely’, from per- ‘through, completely’ + mutare ‘to change’.
See the Oxford Advanced American Dictionary entry: permutation